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Cucurbits Plants: a Key Emphasis to Its Pharmacological Potential

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Cucurbits Plants: a Key Emphasis to Its Pharmacological Potential molecules Review Cucurbits Plants: A Key Emphasis to Its Pharmacological Potential Bahare Salehi 1 , Esra Capanoglu 2 , Nabil Adrar 3 , Gizem Catalkaya 2 , Shabnum Shaheen 4 , Mehwish Jaffer 4, Lalit Giri 5 , Renu Suyal 5, Arun K Jugran 6, Daniela Calina 7 , Anca Oana Docea 8, Senem Kamiloglu 9 , Dorota Kregiel 10 , Hubert Antolak 10 , Ewelina Pawlikowska 10 , Surjit Sen 11,12, Krishnendu Acharya 11, Zeliha Selamoglu 13, Javad Sharifi-Rad 14,* , Miquel Martorell 15,* ,Célia F. Rodrigues 16 , Farukh Sharopov 17 , Natália Martins 18,19,* and Raffaele Capasso 20,* 1 Student Research Committee, School of Medicine, Bam University of Medical Sciences, Bam 44340847, Iran; [email protected] 2 Faculty of Chemical & Metallurgical Engineering, Food Engineering Department, Istanbul Technical University, 34469 Maslak, Turkey; [email protected] (E.C.); [email protected] (G.C.) 3 Laboratoire de Biotechnologie Végétale et d’Ethnobotanique, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia, Bejaia 06000, Algérie; [email protected] 4 Department of Plant Sciences, LCWU, Lahore 54000, Pakistan; [email protected] (S.S.); meh.jaff[email protected] (M.J.) 5 G.B. Pant National Institute of Himalayan Environment & Sustainable Development Kosi-Katarmal, Almora 263 643, India; [email protected] (L.G.); [email protected] (R.S.) 6 G.B. Pant National Institute of Himalayan Environment & Sustainable Development Garhwal Regional Centre, Srinagar 246174, India; [email protected] 7 Department of Clinical Pharmacy, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania; [email protected] 8 Department of Toxicology, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania; [email protected] 9 Mevsim Gida Sanayi ve Soguk Depo Ticaret A.S. (MVSM Foods), Turankoy, Kestel, 16540 Bursa, Turkey; [email protected] 10 Institute of Fermentation Technology and Microbiology, Lodz University of Technology, Wolczanska 171/173, 90-924 Lodz, Poland; [email protected] (D.K.); [email protected] (H.A.); [email protected] (E.P.) 11 Molecular and Applied Mycology and Plant Pathology Laboratory, Department of Botany, University of Calcutta, Kolkata 700019, India; [email protected] (S.S.); [email protected] (K.A.) 12 Department of Botany, Fakir Chand College, Diamond Harbour, West Bengal 743331, India 13 Department of Medical Biology, Faculty of Medicine, Nigde Ömer Halisdemir University, Campus, 51240 Nigde, Turkey; [email protected] 14 Zabol Medicinal Plants Research Center, Zabol University of Medical Sciences, Zabol 61615-585, Iran 15 Department of Pharmacy, Faculty of Pharmacy, University of Concepcion, Concepcion 4070386, Chile 16 LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal; [email protected] 17 Department of Pharmaceutical Technology, Avicenna Tajik State Medical University, Rudaki 139, Dushanbe 734003, Tajikistan; [email protected] 18 Faculty of Medicine, University of Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal 19 Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal 20 Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy * Correspondence: javad.sharifi[email protected] (J.S.-R.); [email protected] (M.M.); [email protected] (N.M.); [email protected] (R.C.); Tel.: +98-21-88200104 (J.S.-R.); +56-41-266-1671 (M.M.); +351-22-5512100 (N.M.); +39-081-678664 (R.C.) Received: 2 April 2019; Accepted: 13 May 2019; Published: 14 May 2019 Molecules 2019, 24, 1854; doi:10.3390/molecules24101854 www.mdpi.com/journal/molecules Molecules 2019, 24, 1854 2 of 23 Abstract: Cucurbita genus has received a renowned interest in the last years. This plant species, native to the Americas, has served worldwide folk medicine for treating gastrointestinal diseases and intestinal parasites, among other clinical conditions. These pharmacological effects have been increasingly correlated with their nutritional and phytochemical composition. Among those chemical constituents, carotenoids, tocopherols, phenols, terpenoids, saponins, sterols, fatty acids, and functional carbohydrates and polysaccharides are those occurring in higher abundance. However, more recently, a huge interest in a class of triterpenoids, cucurbitacins, has been stated, given its renowned biological attributes. In this sense, the present review aims to provide a detailed overview to the folk medicinal uses of Cucurbita plants, and even an in-depth insight on the latest advances with regards to its antimicrobial, antioxidant and anticancer effects. A special emphasis was also given to its clinical effectiveness in humans, specifically in blood glucose levels control in diabetic patients and pharmacotherapeutic effects in low urinary tract diseases. Keywords: cucurbits; pumpkin; squash; antimicrobial; antioxidant; anticancer; traditional medicine 1. Introduction Cucurbita plants have been applied in different cultures as traditional medication. For instance, Native Americans have used pumpkins for the treatment of intestinal worms and urinary ailments, this therapeutic strategy being approved by American doctors in the early nineteenth century as an anthelmintic for worms annihilating [1]. Seeds are used as an anthelmintic, to treat issues of the urinary framework, high blood pressure, to prevent the development of kidney stones, to ease prostate disorders and even to improve the erysipelas skin contamination [2]. In southeastern Europe, Cucurbita pepo L. (pumpkin) seeds have been applied to heal irritable bladder and prostate enlargement. Specifically, in Germany, the use of pumpkin seeds was adopted for application by the authority for irritated bladder conditions and micturition problems of prostate enlargement, although the monograph written in 1985 noted a lack of pharmacological studies that could confirm its effective clinical effects. On the other hand, in the USA, the purchase of all such non-prescription medications for the therapy of prostate enlargement was banned in 1990. In traditional Chinese medicine, Cucurbita moschata Duchesne seeds were also applied for handling the parasitic diseases caused by worms, while Mexican herbalists have used Cucurbita ficifolia Bouché as a remedy for reducing blood sugar levels [3–7]. Indeed, increasing evidence has shown that cucurbits’ medicinal properties depend upon the chemical compounds present, which produce a specific physiological effect in the human body [8–10]. Specifically, cucurbits fruits are found to be beneficial in blood cleansing, purification of toxic substances and good for digestion, besides giving the required energy to improve human health. These species possess a higher amount of proteins, phytosterols [11,12], unsaturated fatty acids [13,14], vitamins (like carotenoids, tocopherols) [15] and microelements (e.g., zinc) [16]. Fruits, seeds and leaves from various Cucurbita members (pumpkin, watermelon, melon, cucumber squash, gourds, etc.) possess different pharmacological effects [17,18], such as antidiabetic [19–21], antiulcer, analgesic, nephroprotective [22] and anticancer activities [18]. In this sense, this review provides a detailed overview to the folk medicinal uses of Cucurbita plants, an in-depth insight on the latest advances regarding its antimicrobial, antioxidant and anticancer effects, and lastly, a special emphasis to its clinical effectiveness in humans, specifically in blood glucose levels control and low urinary tract diseases (Figure1). Molecules 2019, 24, 1854 3 of 23 Molecules 2019, 24, x FOR PEER REVIEW 3 of 22 Figure 1. MostMost pronounced pronounced and investig investigatedated biological effects effects of Cucurbita spp. 2. Cucurbita Plants: A A Brief Brief Overview Overview to to Its Its Ethnopharmacological Ethnopharmacological Uses Uses Recent ethnopharmacological studies showed that C. pepo and Cucurbita maxima Duchesne are among the most commonly used Cucurbita plants for traditional medicinal treatments. As shown in Table1 1,, many many didifferentfferent componentscomponents ofof CucurbitaCucurbita plantsplants are applied in diverse regions of the globe for handling didifferentfferent diseases.diseases. Table 1.1. CucurbitaCucurbita plants traditionally applied in the cures of didifferentfferent diseases in diverse regions of the world. ScientificScientific Name Disease(s) (CommonName Location Local NameLocal Parts Used AdministrationAdministr Disease(s) References Location Parts Used Treatment References Name)(Common Name ation Treatment Digestive Name) Basque Country, Kalabazea Seeds Oral (Intestinal worms, [23] Iberian Peninsula Digestive Constipation) Basque Country, Kalabaze (Intestinal Mkuranga District, Maboga LeavesSeeds Oral Oral Anemia[23] [24 ] IberianTanzania Peninsula a worms, Polish people in Constipation)Intestinal Zapallo Seeds Oral [25] Misiones,Mkuranga Argentina District, parasites Maboga Leaves Oral VomitingAnemia blood, [24] NelliyampathyTanzania hills Seeds Oral Cucurbita Parangi Blood bile [26] of Kerala,Polish people India in Intestinal maxima Zapallo FruitsSeeds Oral Oral Urinal disorders [25] Duchesne Misiones, Argentina Flowers Dermalparasites Cataract (Squash) Vomiting blood, [27] NelliyampathyMauritius hills Giromon SeedsSeeds Oral Oral Renal failure Parangi Fruits DermalBlood Wound bile [26] Cucurbita of Kerala, India Agro Nocerino Fruits Oral Urinal disorders maxima Sarnese,
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